One of my pretty much daily knife tasks is using the tip of whatever's in my pocket to drill holes into plastic boxes before mounting them to walls. I have used the blade tip on the ATR for this repeatedly - but have broken the tip off of my Yojimbo. When I handle Spyderco's the tip is the first thing I look at -most Spyderco's are clearly not designed for my use. So-what Spyderco models (even if no longer in production) have somewhat stouter/thicker tips ?